A British sniper currently holds the publicly known record for a confirmed kill shot. As a Corporal of Horse in the British Army, Craig Harrison used a .338 caliber L115A3 Long Range Rifle to shoot a man from 2,707 yards (1.54 miles) in Afghanistan in 2009.
Variability is a measure of the spread of a data set. Learn more about the different measures of variability including the range, variance, and standard deviation, and how they are used in the field of Psychology.
Range - The simplest measure of variability to compute and understand is the range. 1  The range is the difference between the highest and lowest score in a distribution. Although it is easy to compute, it is not often used as the sole measure of variability due to its instability.